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(No Model.) 3 Sheets-Sheet 1. J. A. GRAHAM. GRAIN BINDER.

Patented July 16, 1889.

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(No Model.) 3 Sheets-Sheet 2. J. A GRAHAM.

GRAIN BINDER.

No. 407,069. Patented Julyl, 1889.

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. J. A. GRAHAM.

GRAIN BINDER.

No. 407,069. Patented July 16, 1889.

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UNITED STATES PATENT OFFICE.

JAMES A. GRAHAM, OF MIIVAUKEE, WISCONSIN, ASSIGNOR TO THE MIL- VAUKEE HARVESTER COMPANY, OF SAME PLACE.

GRAIN-BINDER.

SPECIFICATION forming part of Letters Patent No. 407,069, dated July 16, 1889.

Application filed January 17, 1887. Serial No. 224,541. (No model.)

To all whom t may concern.-

Be it known that I, J AMES A. GRAHAM, ot' Milwaukee, in the county of I\Iilwaukee, and in the State of lVisconsin, have invented certain new and useful Improvements in Grain- Binders; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to the tying mechanism for grain-binders, and is designed as an improvement on the device described and claimed in Letters Patent No. 322,770, granted to Chas. M. Young, July 2l, 1885, and will be fully described hereinafter.

In the drawings, Figure l is a Yfront end elevation of the knetter-head of a grain-binder embodying niy invention, the knetter eamwheel being shown in dotted lines. Eig. 2 is an elevation of the knetter-head from below, the knetter cam-wheel being shown in crosssection; and Fig. 3 is a view of the knetter cam-wheel with the operating anti-friction rollers in place.

Ais the knetter cam-wheel, which is t'ormed of unusual depth, so as to have formed therein two eccentric cam-tracks A and A?, the former extending farther into the wheel than the other, and which are for a certain portion of their length (from the points o a to the points a o) concentric to each other, while 'from the points a o to the point l) the two tracks are side by side, but not concentric, the shallow track A2 extending from the points a a to the peint b, and being for the reception of the anti-friction roller B during a portion of the revolution of the wheel, while the deep track A2 receives both of said anti-friction rollers. That part of the wheel marked A3 (shown in Fig. 3 between the position of the roller B and the points o o and between the track A and the segment-rack) is nonoperative, and this part is merely cut away somewhat from the general plane to reduce the weight and cost of metal of said wheel.

The roller B is on one end ot the knife-arm C, and roller B is on a like end of the disklever C, the latter projecting only a short distance into the groove A', while the knife-arm C extends to the full depth of groove A', as shown in Fig. 2.

The knife-arm C is of bell-crank shape, and is pivoted to the frame D between its elbow and roller end, as shown in dotted circle at d, Fig. 2, and its long arm carries the knife. (Not shown, but which is similar to that in Youngs patent above referred to.)

The disk-lever C is for the greater portion4 of its length substantially crescent-shaped, as shown in Fig. 2, having at one end a bearing for the anti-friction roller B', pivoted thereto, and at the other end a bearing for the shank of the disk-pawl C3, secured thereto, the crescent-shaped portion being between these two ends, and the said disk-lever being pivoted te the frame at C2 about midway between said two ends.

E is the holding-disk, and c is the finger that acts with the disk E to hold the cord. This latter finger c differs from those that have hitherto come under my knowledge, in that it is cast of a single piece of malleable iron.

My improved knetter-head does not differ materially from the Young knetter in operation; but my invention is designed to simplify the Youn g knetter-h ead, in that I greatly reduce the size of cam-wheel, as one groove serves for both of the anti-friction rollers B and B', for the track A and track A2 constitute practically a single groove with two tracks, and take up very much less room than two separate grooves and admit et a much cheaper and smaller casting.

In operation the track A2 carries the roller B when the knife-arm is idle, and the disklever and knife-arm are caused to oscillate at the proper times by the action of the cams in the track A.

It will be noticed that l wholly dispense with the curved and hooked iianges for guiding the end of the disk-lever shown in the Young patent by changing the shape of the disk-lever to a substantially crescent forni in a horizontal plane and pivoting it midway between the roller B and the shank of the diskpawl C, thereby greatly simplifying the construction of the knetter-head.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

IOO

l. In a knotter-head for grain-binders, the combination, with the knife-arm and disk-lever, each having an anti-friction roller at its end, of a Wheel of unusual depth having formed therein two eccentric cam-tracks, one extending farther into the Wheel than vthe other, the said tracks being for a certain portion of their length concentric to each other and -for a certain portion side by side, but non-concentric, substantially as set forth.

2. In a knotter-head for grain-binders, the combination, with the knife-arm C, carrying the anti-friction roller B at one end, and the disk-lever C', earryingthe anti-friction roller B at its corresponding end, of the cam-Wheel A, of unusual depth, having formed therein two eccentric cam-tracks A A2, the former being of greaterv length, depth, and Width than the latter, said tracks being for a cetain portion of their length concentric to each other and fora certain portion side by side, but nonconcentric, substantially as set forth.

3. In4 a knotter-head for grain-bin ders, the

combination, with a cam-Wheel of unusual depth having formed therein two eccentric cam-tracks, one extending farther into the Wheel than the other, the said tracks being for a certain portion of their length concentric to each other and for a certain distance side by side, but non-concentric, of a frame, the disk-lever C', of substantially crescent shape in a horizontal plane and pivoted mid-` JAMES A. GRAHAM.

Titnessesz S. S. S'roUT, G. H. SCHULTE.

Way between its ends to said frame, the anti- 

